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1 | =head1 NAME |
2 | |
3 | perltodo - Perl TO-DO List |
4 | |
5 | =head1 DESCRIPTION |
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6 | |
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7 | This is a list of wishes for Perl. Send updates to |
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8 | I<perl5-porters@perl.org>. If you want to work on any of these |
9 | projects, be sure to check the perl5-porters archives for past ideas, |
10 | flames, and propaganda. This will save you time and also prevent you |
11 | from implementing something that Larry has already vetoed. One set |
12 | of archives may be found at: |
13 | |
14 | http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/ |
15 | |
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16 | =head1 To do during 5.6.x |
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17 | |
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18 | =head2 Support for I/O disciplines |
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19 | |
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20 | C<perlio> provides this, but the interface could be a lot more |
21 | straightforward. |
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22 | |
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23 | =head2 Eliminate need for "use utf8"; |
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24 | |
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25 | While the C<utf8> pragma is autoloaded when necessary, it's still needed |
26 | for things like Unicode characters in a source file. The UTF8 hint can |
27 | always be set to true, but it needs to be set to false when F<utf8.pm> |
28 | is being compiled. (To stop Perl trying to autoload the C<utf8> |
29 | pragma...) |
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30 | |
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31 | =head2 Create a char *sv_pvprintify(sv, STRLEN *lenp, UV flags) |
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32 | |
33 | For displaying PVs with control characters, embedded nulls, and Unicode. |
34 | This would be useful for printing warnings, or data and regex dumping, |
35 | not_a_number(), and so on. |
36 | |
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37 | Requirements: should handle both byte and UTF8 strings. isPRINT() |
38 | characters printed as-is, character less than 256 as \xHH, Unicode |
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39 | characters as \x{HHH}. Don't assume ASCII-like, either, get somebody |
40 | on EBCDIC to test the output. |
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41 | |
42 | Possible options, controlled by the flags: |
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43 | - whitespace (other than ' ' of isPRINT()) printed as-is |
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44 | - use isPRINT_LC() instead of isPRINT() |
45 | - print control characters like this: "\cA" |
46 | - print control characters like this: "^A" |
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47 | - non-PRINTables printed as '.' instead of \xHH |
48 | - use \OOO instead of \xHH |
49 | - use the C/Perl-metacharacters like \n, \t |
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50 | - have a maximum length for the produced string (read it from *lenp) |
51 | - append a "..." to the produced string if the maximum length is exceeded |
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52 | - really fancy: print unicode characters as \N{...} |
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53 | |
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54 | =head2 Autoload byte.pm |
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55 | |
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56 | When the lexer sees, for instance, C<bytes::length>, it should |
57 | automatically load the C<bytes> pragma. |
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58 | |
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59 | =head2 Make "\u{XXXX}" et al work |
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60 | |
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61 | Danger, Will Robinson! Discussing the semantics of C<"\x{F00}">, |
62 | C<"\xF00"> and C<"\U{F00}"> on P5P I<will> lead to a long and boring |
63 | flamewar. |
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64 | |
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65 | =head2 Overloadable regex assertions |
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66 | |
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67 | This may or may not be possible with the current regular expression |
68 | engine. The idea is that, for instance, C<\b> needs to be |
69 | algorithmically computed if you're dealing with Thai text. Hence, the |
70 | B<\b> assertion wants to be overloaded by a function. |
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71 | |
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72 | =head2 Unicode collation and normalization |
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73 | |
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74 | Simon Cozens promises to work on this. |
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75 | |
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76 | Collation? http://www.unicode.org/unicode/reports/tr10/ |
77 | Normalization? http://www.unicode.org/unicode/reports/tr15/ |
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78 | |
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79 | =head2 Unicode case mappings |
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80 | |
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81 | Case Mappings? http://www.unicode.org/unicode/reports/tr21/ |
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82 | |
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83 | =head2 Unicode regular expression character classes |
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84 | |
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85 | They have some tricks Perl doesn't yet implement like character |
86 | class subtraction. |
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87 | |
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88 | http://www.unicode.org/unicode/reports/tr18/ |
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89 | |
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90 | =head2 use Thread for iThreads |
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91 | |
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92 | Artur Bergman's C<iThreads> module is a start on this, but needs to |
93 | be more mature. |
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94 | |
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95 | =head2 make perl_clone optionally clone ops |
96 | |
97 | So that pseudoforking, mod_perl, iThreads and nvi will work properly |
98 | (but not as efficiently) until the regex engine is fixed to be threadsafe. |
99 | |
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100 | =head2 Work out exit/die semantics for threads |
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101 | |
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102 | =head2 Typed lexicals for compiler |
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103 | |
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104 | =head2 Compiler workarounds for Win32 |
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105 | |
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106 | =head2 AUTOLOADing in the compiler |
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107 | |
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108 | =head2 Fixing comppadlist when compiling |
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109 | |
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110 | =head2 Cleaning up exported namespace |
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111 | |
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112 | =head2 Complete signal handling |
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113 | |
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114 | Add C<PERL_ASYNC_CHECK> to opcodes which loop; replace C<sigsetjmp> with |
115 | C<sigjmp>; check C<wait> for signal safety. |
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116 | |
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117 | =head2 Out-of-source builds |
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118 | |
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119 | This was done for 5.6.0, but needs reworking for 5.7.x |
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120 | |
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121 | =head2 POSIX realtime support |
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122 | |
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123 | POSIX 1003.1 1996 Edition support--realtime stuff: POSIX semaphores, |
124 | message queues, shared memory, realtime clocks, timers, signals (the |
125 | metaconfig units mostly already exist for these) |
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126 | |
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127 | =head2 UNIX98 support |
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128 | |
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129 | Reader-writer locks, realtime/asynchronous IO |
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130 | |
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131 | =head2 IPv6 Support |
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132 | |
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133 | There are non-core modules, such as C<Net::IPv6>, but these will need |
134 | integrating when IPv6 actually starts to really happen. See RFC 2292 |
135 | and RFC 2553. |
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136 | |
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137 | =head2 Long double conversion |
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138 | |
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139 | Floating point formatting is still causing some weird test failures. |
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140 | |
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141 | =head2 Locales |
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142 | |
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143 | Locales and Unicode interact with each other in unpleasant ways. |
144 | One possible solution would be to adopt/support ICU: |
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145 | |
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146 | http://oss.software.ibm.com/developerworks/opensource/icu/project/ |
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147 | |
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148 | =head2 Thread-safe regexes |
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149 | |
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150 | The regular expression engine is currently non-threadsafe. |
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151 | |
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152 | =head2 Arithmetic on non-Arabic numerals |
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153 | |
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154 | C<[1234567890]> aren't the only numerals any more. |
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155 | |
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156 | =head2 POSIX Unicode character classes |
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157 | |
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158 | ([=a=] for equivalance classes, [.ch.] for collation.) |
159 | These are dependent on Unicode normalization and collation. |
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160 | |
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161 | =head2 Factoring out common suffices/prefices in regexps (trie optimization) |
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162 | |
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163 | Currently, the user has to optimize C<foo|far> and C<foo|goo> into |
164 | C<f(?:oo|ar)> and C<[fg]oo> by hand; this could be done automatically. |
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165 | |
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166 | =head2 Security audit shipped utilities |
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167 | |
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168 | All the code we ship with Perl needs to be sensible about temporary file |
169 | handling, locking, input validation, and so on. |
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170 | |
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171 | =head2 Custom opcodes |
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172 | |
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173 | Have a way to introduce user-defined opcodes without the subroutine call |
174 | overhead of an XSUB; the user should be able to create PP code. Simon |
175 | Cozens has some ideas on this. |
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176 | |
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177 | =head2 spawnvp() on Win32 |
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178 | |
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179 | Win32 has problems spawning processes, particularly when the arguments |
180 | to the child process contain spaces, quotes or tab characters. |
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181 | |
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182 | =head2 DLL Versioning |
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183 | |
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184 | Windows needs a way to know what version of a XS or C<libperl> DLL it's |
185 | loading. |
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186 | |
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187 | =head2 Introduce @( and @) |
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188 | |
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189 | C<$(> may return "foo bar baz". Unfortunately, since groups can |
190 | theoretically have spaces in their names, this could be one, two or |
191 | three groups. |
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192 | |
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193 | =head2 Floating point handling |
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194 | |
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195 | C<NaN> and C<inf> support is particularly troublesome. |
196 | (fp_classify(), fp_class(), fp_class_d(), class(), isinf(), |
197 | isfinite(), finite(), isnormal(), unordered(), <ieeefp.h>, |
198 | <fp_class.h> (there are metaconfig units for all these) (I think), |
199 | fp_setmask(), fp_getmask(), fp_setround(), fp_getround() |
200 | (no metaconfig units yet for these). Don't forget finitel(), fp_classl(), |
201 | fp_class_l(), (yes, both do, unfortunately, exist), and unorderedl().) |
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202 | |
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203 | As of Perl 5.6.1 is a Perl macro, Perl_isnan(). |
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204 | |
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205 | =head2 IV/UV preservation |
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206 | |
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207 | Nicholas Clark has done a lot of work on this, but work is continuing. |
208 | C<+>, C<-> and C<*> work, but guards need to be in place for C<%>, C</>, |
209 | C<&>, C<oct>, C<hex> and C<pack>. |
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210 | |
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211 | =head2 Replace pod2html with something using Pod::Parser |
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212 | |
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213 | The CPAN module C<Malik::Pod::Html> may be a more suitable basis for a |
214 | C<pod2html> convertor; the current one duplicates the functionality |
215 | abstracted in C<Pod::Parser>, which makes updating the POD language |
216 | difficult. |
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217 | |
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218 | =head2 Automate module testing on CPAN |
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219 | |
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220 | When a new Perl is being beta tested, porters have to manually grab |
221 | their favourite CPAN modules and test them - this should be done |
222 | automatically. |
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223 | |
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224 | =head2 sendmsg and recvmsg |
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225 | |
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226 | We have all the other BSD socket functions but these. There are |
227 | metaconfig units for these functions which can be added. To avoid these |
228 | being new opcodes, a solution similar to the way C<sockatmark> was added |
229 | would be preferable. (Autoload the C<IO::whatever> module.) |
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230 | |
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231 | =head2 Rewrite perlre documentation |
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232 | |
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233 | The new-style patterns need full documentation, and the whole document |
234 | needs to be a lot clearer. |
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235 | |
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236 | =head2 Convert example code to IO::Handle filehandles |
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237 | |
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238 | =head2 Document Win32 choices |
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239 | |
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240 | =head2 Check new modules |
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241 | |
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242 | =head2 Make roffitall find pods and libs itself |
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243 | |
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244 | Simon Cozens has done some work on this but it needs a rethink. |
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245 | |
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246 | =head1 To do at some point |
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247 | |
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248 | These are ideas that have been regularly tossed around, that most |
249 | people believe should be done maybe during 5.8.x |
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250 | |
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251 | =head2 Remove regular expression recursion |
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252 | |
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253 | Because the regular expression engine is recursive, badly designed |
254 | expressions can lead to lots of recursion filling up the stack. Ilya |
255 | claims that it is easy to convert the engine to being iterative, but |
256 | this has still not yet been done. There may be a regular expression |
257 | engine hit squad meeting at TPC5. |
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258 | |
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259 | =head2 Memory leaks after failed eval |
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260 | |
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261 | Perl will leak memory if you C<eval "hlagh hlagh hlagh hlagh">. This is |
262 | partially because it attempts to build up an op tree for that code and |
263 | doesn't properly free it. The same goes for non-syntactically-correct |
264 | regular expressions. Hugo looked into this, but decided it needed a |
265 | mark-and-sweep GC implementation. |
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266 | |
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267 | Alan notes that: The basic idea was to extend the parser token stack |
268 | (C<YYSTYPE>) to include a type field so we knew what sort of thing each |
269 | element of the stack was. The F<<perly.c> code would then have to be |
270 | postprocessed to record the type of each entry on the stack as it was |
271 | created, and the parser patched so that it could unroll the stack |
272 | properly on error. |
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273 | |
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274 | This is possible to do, but would be pretty messy to implement, as it |
275 | would rely on even more sed hackery in F<perly.fixer>. |
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276 | |
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277 | =head2 pack "(stuff)*" |
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278 | |
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279 | That's to say, C<pack "(sI)40"> would be the same as C<pack "sI"x40> |
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280 | |
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281 | =head2 bitfields in pack |
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282 | |
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283 | =head2 Cross compilation |
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284 | |
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285 | Make Perl buildable with a cross-compiler. This will play havoc with |
286 | Configure, which needs to how how the target system will respond to |
287 | its tests; maybe C<microperl> will be a good starting point here. |
288 | (Indeed, Bart Schuller reports that he compiled up C<microperl> for |
289 | the Agenda PDA and it works fine.) A really big spanner in the works |
290 | is the bootstrapping build process of Perl: if the filesystem the |
291 | target systems sees is not the same what the build host sees, various |
292 | input, output, and (Perl) library files need to be copied back and forth. |
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293 | |
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294 | =head2 Perl preprocessor / macros |
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295 | |
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296 | Source filters help with this, but do not get us all the way. For |
297 | instance, it should be possible to implement the C<??> operator somehow; |
298 | source filters don't (quite) cut it. |
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299 | |
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300 | =head2 Perl lexer in Perl |
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301 | |
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302 | Damian Conway is planning to work on this, but it hasn't happened yet. |
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303 | |
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304 | =head2 Using POSIX calls internally |
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305 | |
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306 | When faced with a BSD vs. SySV -style interface to some library or |
307 | system function, perl's roots show in that it typically prefers the BSD |
308 | interface (but falls back to the SysV one). One example is getpgrp(). |
309 | Other examples include C<memcpy> vs. C<bcopy>. There are others, mostly in |
310 | F<<pp_sys.c>. |
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311 | |
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312 | Mostly, this item is a suggestion for which way to start a journey into |
313 | an C<#ifdef> forest. It is not primarily a suggestion to eliminate any of |
314 | the C<#ifdef> forests. |
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315 | |
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316 | POSIX calls are perhaps more likely to be portable to unexpected |
317 | architectures. They are also perhaps more likely to be actively |
318 | maintained by a current vendor. They are also perhaps more likely to be |
319 | available in thread-safe versions, if appropriate. |
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320 | |
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321 | =head2 -i rename file when changed |
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322 | |
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323 | It's only necessary to rename a file when inplace editing when the file |
324 | has changed. Detecting a change is perhaps the difficult bit. |
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325 | |
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326 | =head2 All ARGV input should act like E<lt>E<gt> |
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327 | |
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328 | =head2 Support for rerunning debugger |
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329 | |
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330 | There should be a way of restarting the debugger on demand. |
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331 | |
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332 | =head2 Test Suite for the Debugger |
333 | |
334 | The debugger is a complex piece of software and fixing something |
335 | here may inadvertently break something else over there. To tame |
336 | this chaotic behaviour, a test suite is necessary. |
337 | |
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338 | =head2 my sub foo { } |
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339 | |
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340 | The basic principle is sound, but there are problems with the semantics |
341 | of self-referential and mutually referential lexical subs: how to |
342 | declare the subs? |
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343 | |
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344 | =head2 One-pass global destruction |
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345 | |
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346 | Sweeping away all the allocated memory in one go is a laudable goal, but |
347 | it's difficult and in most cases, it's easier to let the memory get |
348 | freed by exiting. |
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349 | |
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350 | =head2 Rewrite regexp parser |
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351 | |
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352 | There has been talk recently of rewriting the regular expression parser |
353 | to produce an optree instead of a chain of opcodes; it's unclear whether |
354 | or not this would be a win. |
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355 | |
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356 | =head2 Cache recently used regexps |
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357 | |
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358 | This is to speed up |
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359 | |
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360 | for my $re (@regexps) { |
361 | $matched++ if /$re/ |
362 | } |
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363 | |
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364 | C<qr//> already gives us a way of saving compiled regexps, but it should |
365 | be done automatically. |
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366 | |
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367 | =head2 Re-entrant functions |
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368 | |
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369 | Add configure probes for C<_r> forms of system calls and fit them to the |
370 | core. Unfortunately, calling conventions for these functions and not |
371 | standardised. |
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372 | |
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373 | =head2 Cross-compilation support |
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374 | |
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375 | Bart Schuller reports that using C<microperl> and a cross-compiler, he |
376 | got Perl working on the Agenda PDA. However, one cannot build a full |
377 | Perl because Configure needs to get the results for the target platform, |
378 | for the host. |
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379 | |
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380 | =head2 Bit-shifting bitvectors |
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381 | |
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382 | Given: |
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383 | |
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384 | vec($v, 1000, 1) = 1; |
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385 | |
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386 | One should be able to do |
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387 | |
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388 | $v <<= 1; |
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389 | |
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390 | and have the 999'th bit set. |
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391 | |
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392 | Currently if you try with shift bitvectors you shift the NV/UV, instead |
393 | of the bits in the PV. Not very logical. |
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394 | |
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395 | =head2 debugger pragma |
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396 | |
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397 | The debugger is implemented in Perl in F<perl5db.pl>; turning it into a |
398 | pragma should be easy, but making it work lexically might be more |
399 | difficult. Fiddling with C<$^P> would be necessary. |
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400 | |
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401 | =head2 use less pragma |
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402 | |
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403 | Identify areas where speed/memory tradeoffs can be made and have a hint |
404 | to switch between them. |
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405 | |
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406 | =head2 switch structures |
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407 | |
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408 | Although we have C<Switch.pm> in core, Larry points to the dormant |
409 | C<nswitch> and C<cswitch> ops in F<pp.c>; using these opcodes would be |
410 | much faster. |
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411 | |
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412 | =head2 Cache eval tree |
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413 | |
722d2a37 |
414 | =head2 rcatmaybe |
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415 | |
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416 | =head2 Shrink opcode tables |
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417 | |
722d2a37 |
418 | =head2 Optimize away @_ |
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419 | |
722d2a37 |
420 | Look at the "reification" code in C<av.c> |
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421 | |
722d2a37 |
422 | =head2 Prototypes versus indirect objects |
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423 | |
722d2a37 |
424 | Currently, indirect object syntax bypasses prototype checks. |
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425 | |
722d2a37 |
426 | =head2 Install HMTL |
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427 | |
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428 | HTML versions of the documentation need to be installed by default; a |
429 | call to C<installhtml> from C<installperl> may be all that's necessary. |
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430 | |
722d2a37 |
431 | =head2 Prototype method calls |
e50bb9a1 |
432 | |
722d2a37 |
433 | =head2 Return context prototype declarations |
e50bb9a1 |
434 | |
722d2a37 |
435 | =head2 magic_setisa |
e50bb9a1 |
436 | |
722d2a37 |
437 | =head2 Garbage collection |
e50bb9a1 |
438 | |
722d2a37 |
439 | There have been persistent mumblings about putting a mark-and-sweep |
440 | garbage detector into Perl; Alan Burlison has some ideas about this. |
e50bb9a1 |
441 | |
722d2a37 |
442 | =head2 IO tutorial |
e50bb9a1 |
443 | |
722d2a37 |
444 | Mark-Jason Dominus has the beginnings of one of these. |
e50bb9a1 |
445 | |
722d2a37 |
446 | =head2 pack/unpack tutorial |
e50bb9a1 |
447 | |
722d2a37 |
448 | Simon Cozens has the beginnings of one of these. |
e50bb9a1 |
449 | |
722d2a37 |
450 | =head2 Rewrite perldoc |
e50bb9a1 |
451 | |
722d2a37 |
452 | There are a few suggestions for what to do with C<perldoc>: maybe a |
453 | full-text search, an index function, locating pages on a particular |
454 | high-level subject, and so on. |
e50bb9a1 |
455 | |
3958b146 |
456 | =head2 Install .3p manpages |
e50bb9a1 |
457 | |
3958b146 |
458 | This is a bone of contention; we can create C<.3p> manpages for each |
722d2a37 |
459 | built-in function, but should we install them by default? Tcl does this, |
460 | and it clutters up C<apropos>. |
e50bb9a1 |
461 | |
722d2a37 |
462 | =head2 Unicode tutorial |
e50bb9a1 |
463 | |
722d2a37 |
464 | Simon Cozens promises to do this before he gets old. |
e50bb9a1 |
465 | |
722d2a37 |
466 | =head2 Update POSIX.pm for 1003.1-2 |
3958b146 |
467 | |
722d2a37 |
468 | =head2 Retargetable installation |
e50bb9a1 |
469 | |
722d2a37 |
470 | Allow C<@INC> to be changed after Perl is built. |
e50bb9a1 |
471 | |
722d2a37 |
472 | =head2 POSIX emulation on non-POSIX systems |
e50bb9a1 |
473 | |
722d2a37 |
474 | Make C<POSIX.pm> behave as POSIXly as possible everywhere, meaning we |
475 | have to implement POSIX equivalents for some functions if necessary. |
e50bb9a1 |
476 | |
722d2a37 |
477 | =head2 Rename Win32 headers |
e50bb9a1 |
478 | |
722d2a37 |
479 | =head2 Finish off lvalue functions |
480 | |
481 | They don't work in the debugger, and they don't work for list or hash |
482 | slices. |
e50bb9a1 |
483 | |
722d2a37 |
484 | =head2 Update sprintf documentation |
e50bb9a1 |
485 | |
722d2a37 |
486 | Hugo van der Sanden plans to look at this. |
e50bb9a1 |
487 | |
722d2a37 |
488 | =head2 Use fchown/fchmod internally |
e50bb9a1 |
489 | |
722d2a37 |
490 | This has been done in places, but needs a thorough code review. |
491 | Also fchdir is available in some platforms. |
e50bb9a1 |
492 | |
722d2a37 |
493 | =head1 Vague ideas |
e50bb9a1 |
494 | |
722d2a37 |
495 | Ideas which have been discussed, and which may or may not happen. |
e50bb9a1 |
496 | |
722d2a37 |
497 | =head2 ref() in list context |
e50bb9a1 |
498 | |
722d2a37 |
499 | It's unclear what this should do or how to do it without breaking old |
500 | code. |
e50bb9a1 |
501 | |
722d2a37 |
502 | =head2 Make tr/// return histogram |
e50bb9a1 |
503 | |
722d2a37 |
504 | There is a patch for this, but it may require Unicodification. |
e50bb9a1 |
505 | |
722d2a37 |
506 | =head2 Compile to real threaded code |
3958b146 |
507 | |
722d2a37 |
508 | =head2 Structured types |
3958b146 |
509 | |
722d2a37 |
510 | =head2 Modifiable $1 et al. |
e50bb9a1 |
511 | |
722d2a37 |
512 | ($x = "elephant") =~ /e(ph)/; |
513 | $1 = "g"; # $x = "elegant" |
e50bb9a1 |
514 | |
722d2a37 |
515 | What happens if there are multiple (nested?) brackets? What if the |
516 | string changes between the match and the assignment? |
e50bb9a1 |
517 | |
722d2a37 |
518 | =head2 Procedural interfaces for IO::*, etc. |
e50bb9a1 |
519 | |
722d2a37 |
520 | Some core modules have been accused of being overly-OO. Adding |
521 | procedural interfaces could demystify them. |
e50bb9a1 |
522 | |
722d2a37 |
523 | =head2 RPC modules |
e50bb9a1 |
524 | |
722d2a37 |
525 | =head2 Attach/detach debugger from running program |
e50bb9a1 |
526 | |
722d2a37 |
527 | With C<gdb>, you can attach the debugger to a running program if you |
528 | pass the process ID. It would be good to do this with the Perl debugger |
529 | on a running Perl program, although I'm not sure how it would be done. |
e50bb9a1 |
530 | |
722d2a37 |
531 | =head2 Alternative RE syntax module |
e50bb9a1 |
532 | |
722d2a37 |
533 | use Regex::Newbie; |
534 | $re = Regex::Newbie->new |
535 | ->start |
536 | ->match("foo") |
537 | ->repeat(Regex::Newbie->class("char"),3) |
538 | ->end; |
539 | /$re/; |
e50bb9a1 |
540 | |
722d2a37 |
541 | =head2 GUI::Native |
e50bb9a1 |
542 | |
722d2a37 |
543 | A non-core module that would use "native" GUI to create graphical |
544 | applications. |
e50bb9a1 |
545 | |
722d2a37 |
546 | =head2 foreach(reverse ...) |
e50bb9a1 |
547 | |
722d2a37 |
548 | Currently |
e50bb9a1 |
549 | |
722d2a37 |
550 | foreach (reverse @_) { ... } |
e50bb9a1 |
551 | |
722d2a37 |
552 | puts C<@_> on the stack, reverses it putting the reversed version on the |
553 | stack, then iterates forwards. Instead, it could be special-cased to put |
554 | C<@_> on the stack then iterate backwards. |
e50bb9a1 |
555 | |
722d2a37 |
556 | =head2 Constant function cache |
e50bb9a1 |
557 | |
722d2a37 |
558 | =head2 Approximate regular expression matching |
e50bb9a1 |
559 | |
722d2a37 |
560 | =head1 Ongoing |
e50bb9a1 |
561 | |
722d2a37 |
562 | These items B<always> need doing: |
e50bb9a1 |
563 | |
722d2a37 |
564 | =head2 Update guts documentation |
e50bb9a1 |
565 | |
722d2a37 |
566 | Simon Cozens tries to do this when possible, and contributions to the |
567 | C<perlapi> documentation is welcome. |
e50bb9a1 |
568 | |
722d2a37 |
569 | =head2 Add more tests |
e50bb9a1 |
570 | |
722d2a37 |
571 | Michael Schwern will donate $500 to Yet Another Society when all core |
572 | modules have tests. |
e50bb9a1 |
573 | |
722d2a37 |
574 | =head2 Update auxiliary tools |
e50bb9a1 |
575 | |
722d2a37 |
576 | The code we ship with Perl should look like good Perl 5. |
e50bb9a1 |
577 | |
722d2a37 |
578 | =head1 Recently done things |
e50bb9a1 |
579 | |
722d2a37 |
580 | These are things which have been on the todo lists in previous releases |
581 | but have recently been completed. |
e50bb9a1 |
582 | |
722d2a37 |
583 | =head2 Safe signal handling |
e50bb9a1 |
584 | |
722d2a37 |
585 | A new signal model went into 5.7.1 without much fanfare. Operations and |
586 | C<malloc>s are no longer interrupted by signals, which are handled |
587 | between opcodes. This means that C<PERL_ASYNC_CHECK> now actually does |
588 | something. However, there are still a few things that need to be done. |
e50bb9a1 |
589 | |
722d2a37 |
590 | =head2 Tie Modules |
e50bb9a1 |
591 | |
722d2a37 |
592 | Modules which implement arrays in terms of strings, substrings or files |
593 | can be found on the CPAN. |
e50bb9a1 |
594 | |
722d2a37 |
595 | =head2 gettimeofday |
e50bb9a1 |
596 | |
722d2a37 |
597 | C<Time::Hires> has been integrated into the core. |
e50bb9a1 |
598 | |
722d2a37 |
599 | =head2 setitimer and getimiter |
e50bb9a1 |
600 | |
722d2a37 |
601 | Adding C<Time::Hires> got us this too. |
e50bb9a1 |
602 | |
722d2a37 |
603 | =head2 Testing __DIE__ hook |
604 | |
605 | Tests have been added. |
606 | |
607 | =head2 CPP equivalent in Perl |
e50bb9a1 |
608 | |
722d2a37 |
609 | A C Yardley will probably have done this by the time you can read this. |
610 | This allows for a generalization of the C constant detection used in |
611 | building C<Errno.pm>. |
e50bb9a1 |
612 | |
722d2a37 |
613 | =head2 Explicit switch statements |
e50bb9a1 |
614 | |
722d2a37 |
615 | C<Switch.pm> has been integrated into the core to give you all manner of |
616 | C<switch...case> semantics. |
e50bb9a1 |
617 | |
722d2a37 |
618 | =head2 autocroak |
e50bb9a1 |
619 | |
722d2a37 |
620 | This is C<Fatal.pm>. |
e50bb9a1 |
621 | |
722d2a37 |
622 | =head2 UTF/EBCDIC |
e50bb9a1 |
623 | |
722d2a37 |
624 | Nick Ing-Simmons has made UTF-EBCDIC (UTR13) work with Perl. |
e50bb9a1 |
625 | |
722d2a37 |
626 | EBCDIC? http://www.unicode.org/unicode/reports/tr16/ |
e50bb9a1 |
627 | |
722d2a37 |
628 | =head2 UTF Regexes |
e50bb9a1 |
629 | |
722d2a37 |
630 | Although there are probably some small bugs to be rooted out, Jarkko |
631 | Hietaniemi has made regular expressions polymorphic between bytes and |
632 | characters. |
e50bb9a1 |
633 | |
722d2a37 |
634 | =head2 perlcc to produce executable |
e50bb9a1 |
635 | |
722d2a37 |
636 | C<perlcc> was recently rewritten, and can now produce standalone |
637 | executables. |
e50bb9a1 |
638 | |
722d2a37 |
639 | =head2 END blocks saved in compiled output |
e50bb9a1 |
640 | |
722d2a37 |
641 | =head2 Secure temporary file module |
e50bb9a1 |
642 | |
722d2a37 |
643 | Tim Jenness' C<File::Temp> is now in core. |
e50bb9a1 |
644 | |
722d2a37 |
645 | =head2 Integrate Time::HiRes |
e50bb9a1 |
646 | |
722d2a37 |
647 | This module is now part of core. |
e50bb9a1 |
648 | |
722d2a37 |
649 | =head2 Turn Cwd into XS |
e50bb9a1 |
650 | |
722d2a37 |
651 | Benjamin Sugars has done this. |
e50bb9a1 |
652 | |
722d2a37 |
653 | =head2 Mmap for input |
e50bb9a1 |
654 | |
722d2a37 |
655 | Nick Ing-Simmons' C<perlio> supports an C<mmap> IO method. |
e50bb9a1 |
656 | |
722d2a37 |
657 | =head2 Byte to/from UTF8 and UTF8 to/from local conversion |
e50bb9a1 |
658 | |
722d2a37 |
659 | C<Encode> provides this. |
e50bb9a1 |
660 | |
722d2a37 |
661 | =head2 Add sockatmark support |
e50bb9a1 |
662 | |
722d2a37 |
663 | Added in 5.7.1 |
e50bb9a1 |
664 | |
722d2a37 |
665 | =head2 Mailing list archives |
666 | |
667 | http://lists.perl.org/, http://archive.develooper.com/ |
668 | |
669 | =head2 Bug tracking |
670 | |
671 | Richard Foley has written the bug tracking system at http://bugs.perl.org/ |
e50bb9a1 |
672 | |
722d2a37 |
673 | =head2 Integrate MacPerl |
e50bb9a1 |
674 | |
722d2a37 |
675 | Chris Nandor and Matthias Neeracher have integrated the MacPerl changes |
676 | into 5.6.0. |
e50bb9a1 |
677 | |
722d2a37 |
678 | =head2 Web "nerve center" for Perl |
e50bb9a1 |
679 | |
722d2a37 |
680 | http://use.perl.org/ is what you're looking for. |
e50bb9a1 |
681 | |
722d2a37 |
682 | =head2 Regular expression tutorial |
e50bb9a1 |
683 | |
722d2a37 |
684 | C<perlretut>, provided by Mark Kvale. |
e50bb9a1 |
685 | |
722d2a37 |
686 | =head2 Debugging Tutorial |
e50bb9a1 |
687 | |
722d2a37 |
688 | C<perldebtut>, written by Richard Foley. |
e50bb9a1 |
689 | |
722d2a37 |
690 | =head2 Integrate new modules |
e50bb9a1 |
691 | |
722d2a37 |
692 | Jarkko has been integrating madly into 5.7.x |
e50bb9a1 |
693 | |
722d2a37 |
694 | =head2 Integrate profiler |
e50bb9a1 |
695 | |
722d2a37 |
696 | C<Devel::DProf> is now a core module. |
e50bb9a1 |
697 | |
722d2a37 |
698 | =head2 Y2K error detection |
e50bb9a1 |
699 | |
722d2a37 |
700 | There's a configure option to detect unsafe concatenation with "19", and |
701 | a CPAN module. (C<D'oh::Year>) |
e50bb9a1 |
702 | |
722d2a37 |
703 | =head2 Regular expression debugger |
e50bb9a1 |
704 | |
722d2a37 |
705 | While not part of core, Mark-Jason Dominus has written C<Rx> and has |
706 | also come up with a generalised strategy for regular expression |
707 | debugging. |
e50bb9a1 |
708 | |
722d2a37 |
709 | =head2 POD checker |
e50bb9a1 |
710 | |
722d2a37 |
711 | That's, uh, F<podchecker> |
e50bb9a1 |
712 | |
722d2a37 |
713 | =head2 "Dynamic" lexicals |
e50bb9a1 |
714 | |
722d2a37 |
715 | =head2 Cache precompiled modules |
e50bb9a1 |
716 | |
722d2a37 |
717 | =head1 Deprecated Wishes |
e50bb9a1 |
718 | |
722d2a37 |
719 | These are items which used to be in the todo file, but have been |
720 | deprecated for some reason. |
e50bb9a1 |
721 | |
722d2a37 |
722 | =head2 Loop control on do{} |
e50bb9a1 |
723 | |
722d2a37 |
724 | This would break old code; use C<do{{ }}> instead. |
e50bb9a1 |
725 | |
722d2a37 |
726 | =head2 Lexically scoped typeglobs |
e50bb9a1 |
727 | |
722d2a37 |
728 | Not needed now we have lexical IO handles. |
e50bb9a1 |
729 | |
722d2a37 |
730 | =head2 format BOTTOM |
3958b146 |
731 | |
722d2a37 |
732 | =head2 report HANDLE |
e50bb9a1 |
733 | |
722d2a37 |
734 | Damian Conway's text formatting modules seem to be the Way To Go. |
e50bb9a1 |
735 | |
722d2a37 |
736 | =head2 Generalised want()/caller()) |
3958b146 |
737 | |
722d2a37 |
738 | =head2 Named prototypes |
e50bb9a1 |
739 | |
722d2a37 |
740 | These both seem to be delayed until Perl 6. |
e50bb9a1 |
741 | |
722d2a37 |
742 | =head2 Built-in globbing |
e50bb9a1 |
743 | |
722d2a37 |
744 | The C<File::Glob> module has been used to replace the C<glob> function. |
e50bb9a1 |
745 | |
722d2a37 |
746 | =head2 Regression tests for suidperl |
e50bb9a1 |
747 | |
722d2a37 |
748 | C<suidperl> is deprecated in favour of common sense. |
e50bb9a1 |
749 | |
722d2a37 |
750 | =head2 Cached hash values |
e50bb9a1 |
751 | |
722d2a37 |
752 | We have shared hash keys, which perform the same job. |
e50bb9a1 |
753 | |
722d2a37 |
754 | =head2 Add compression modules |
e50bb9a1 |
755 | |
722d2a37 |
756 | The compression modules are a little heavy; meanwhile, Nick Clark is |
757 | working on experimental pragmata to do transparent decompression on |
758 | input. |
e50bb9a1 |
759 | |
722d2a37 |
760 | =head2 Reorganise documentation into tutorials/references |
e50bb9a1 |
761 | |
722d2a37 |
762 | Could not get consensus on P5P about this. |
e50bb9a1 |
763 | |
722d2a37 |
764 | =head2 Remove distinction between functions and operators |
765 | |
766 | Caution: highly flammable. |
767 | |
768 | =head2 Make XS easier to use |
e50bb9a1 |
769 | |
722d2a37 |
770 | Use C<Inline> instead, or SWIG. |
e50bb9a1 |
771 | |
722d2a37 |
772 | =head2 Make embedding easier to use |
e50bb9a1 |
773 | |
722d2a37 |
774 | Use C<Inline::CPR>. |
e50bb9a1 |
775 | |
722d2a37 |
776 | =head2 man for perl |
04c70446 |
777 | |
722d2a37 |
778 | See the Perl Power Tools. (http://language.perl.com/ppt/) |
04c70446 |
779 | |
722d2a37 |
780 | =head2 my $Package::variable |
04c70446 |
781 | |
722d2a37 |
782 | Use C<our> instead. |
04c70446 |
783 | |
722d2a37 |
784 | =head2 "or" tests defined, not truth |
04c70446 |
785 | |
722d2a37 |
786 | Suggesting this on P5P B<will> cause a boring and interminable flamewar. |
04c70446 |
787 | |
722d2a37 |
788 | =head2 "class"-based lexicals |
04c70446 |
789 | |
cbb3fa72 |
790 | Use flyweight objects, secure hashes or, dare I say it, pseudo-hashes instead. |
04c70446 |
791 | |
722d2a37 |
792 | =head2 byteperl |
04c70446 |
793 | |
722d2a37 |
794 | C<ByteLoader> covers this. |
04c70446 |
795 | |
722d2a37 |
796 | =head2 Lazy evaluation / tail recursion removal |
04c70446 |
797 | |
722d2a37 |
798 | C<List::Util> in core gives some of these; tail recursion removal is |
799 | done manually, with C<goto &whoami;>. (However, MJD has found that |
800 | C<goto &whoami> introduces a performance penalty, so maybe there should |
801 | be a way to do this after all: C<sub foo {START: ... goto START;> is |
802 | better.) |
0562c0e3 |
803 | |
804 | =head2 Make "use utf8" the default |
805 | |
806 | There is a patch available for this, search p5p archives for |
807 | the Subject "[EXPERIMENTAL PATCH] make unicode (utf8) default" |
808 | but this would be unacceptable because of backward compatibility: |
809 | scripts could not contain B<any legacy eight-bit data>. Also would |
810 | introduce a measurable slowdown of at least few percentages since all |
811 | regular expression operations would be done in full UTF-8. |
812 | |